Every once in a while it can backfire because the rest of their team is basically standing around doing nothing on offense when the opponent is actually playing and making real baskets. Especially if they're taking a ton of bogus gift 2 shot fts and the other team is making/taking 3s.
In the Pacers/Cavs series there were like 10 minute stretches where four Cavs players weren't involved in any offense, it was just Mitchell drawing fouls and the rest of their team standing around watching his free throw contest. Meanwhile on the other end the Pacers were slinging the ball all over the place and making shots because they had to with no calls. At some point you need to make an actual shot even with all the FT gifts.